Stereophonic baffle

Abstract

A stereophonic baffle comprises a first transducer group (7 to 10) located along a first line and fed by a right signal of a Hi-Fi chain and a second group of transducers (11 and 15) located according to a second line, forming an angle with the first line, and fed by a left signal. The left and right signals feeding the groups of transducers (7 and 10 and 11 to 15) are in phase and the path (a to e) separating the active zones of the two associated transducers (6,11; 7,12; 8,13; 9,14; 10,15) is equal to an odd multiple of the half wave length of a frequency comprised between 300 and 1000 Hz thus creating an acoustic coupling for the frequency, between the two transducers. The coupling frequencies of the different transducer couples are different.

I claim: 
     
       1. A monolithic stereophonic baffle, comprising (a) a first group of loud-speakers arranged along a first line and receiving a right signal from an amplifier;   (b) a second group of loud-speakers arranged along a second line at an angle to said first line and receiving a left signal from the amplifier, each loud-speaker of said second group of loud-speakers being associated with one loud-speaker of said first group of loud-speakers;   (c) the right and left signals from the amplifier being in phase;   (d) the path separating the active zones of associated loud-speakers being generally equal to an odd multiple of half of the wavelength of a frequency between 300 and 1000 Hz, thereby creating acoustical coupling for said frequency between said associated loud-speakers;   (e) the coupling frequencies for different associated loud-speakers being different;   (f) the baffle comprising a planar baffle carrying loud-speakers disposed along two lines forming an angle between them, each couple of loud-speakers being connected by a resonance chamber tuned on the coupling frequency of said couple.   
     
     
       2. A baffle as claimed in claim 1, in which at least one of said first and second lines is curved. 
     
     
       3. A monolithic stereophonic baffle, comprising (a) a first group of loud-speakers arranged along a first and receiving a right signal from an amplifier;   (b) a second group of loud-speakers arranged along a second line at an angle to said first line and receiving a left signal from the amplifier, each loud-speaker of said second group of loud-speakers being associated with one loud-speaker of said first group of loud-speakers;   (c) the right and left signals from the amplifier being in phase;   (d) the path separatintg the active zones of associated loud-speakers being generally equal to an odd multiple of half of the wavelength of a frequency between 300 and 1000 Hz, thereby creating acoustical coupling for said frequency between said associated loud-speakers;   (e) the coupling frequencies for different associated loud-speakers being different;   (f) each couple associated loud-speakers being connected by a resonance chamber tuned to the coupling frequency of said couple.   
     
     
       4. A baffle as claimed in claim 3, in which at least one of said first and second lines is curved. 
     
     
       5. A monolithic stereophonic baffle, comprising (a) a first group of loud-speakers arranged along a first line and receiving a right signal from an amplifier;   (b) a second grou of loud-speakers arranged along a second line at an angle to said first line and receiving a left signal from the amplifier, each loud-speaker of said second group of loud-speakers being associated with one loud-speaker of said first group of loud-speakers;   (c) the right and left signals from the amplifier being in phase;   (d) the path separating the active zones of associated loud-speakers being generally equal to an odd multiple of half of the wavelength of a frequency between 300 and 1000 Hz, thereby creating acoustical coupling for said frequency between said associated loud-speakers;   (e) the coupling frequencies for different associated loud-speakers being different;   (f) the signals feeding associated couples of loue-speakers being delayed in time so that the wave fronts which different couples emit are synchronized with one another in the plane of symmetry of the baffle.   
     
     
       6. A baffle as claimed in claim 5, in which at least one of said first and second lines is curved. 
     
     
       7. A monolithic stereophonic baffle, comprising (a) a first group of loud-speakers arranged along a first line and receiving a right signal from an amplifier;   (b) a second group of loud-spealers arranged along a second line at an angle to said first line and receiving a left signal from the amplifier, each loud-speaker of said second group of loud-speakers being associated with one loud-speaker of said first group of loud-speakers;   (c) the right and left signals from the amplifier being in phase;   (d) the path separating the active zones of associated loud-speakers being generally equal to an odd multiple of half of the wavelength of a frequency between 300 and 1000 Hz, thereby creating acoustical coupling for said frequency between said associated loud-speakers;   (e) the coupling frequencies for different associated loud-speakers being different;   (f) and a couple of supplementary loud-speakers coupled to a frequency comprised between 300 and 1000 Hz, these supplementary loud-speakers being fed by left and right signals, respectively, which are in phase opposition.   
     
     
       8. A baffle as claimed in claim 7, in which at least one of said first and second lines is curved.